Home / 21,505.60-29,689.44-13,009.12

Finding the Fourth Proportional to 21,505.60, 29,689.44 and 13,009.12

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Solution

The fourth proportional to 21,505.60, 29,689.44 and 13,009.12 is: 17,959.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,505.60 : 29,689.44 = 13,009.12 : x
  2. Step 2: Convert to fraction form
    21,505.60/29,689.44 = 13,009.12/x
  3. Step 3: Cross multiply
    21,505.60x = 29,689.44 × 13,009.12
  4. Step 4: Simplify right side
    21,505.60x = 386,233,487.69
  5. Step 5: Solve for x
    x = 386,233,487.69/21,505.60
  6. Step 6: Final answer
    x = 17,959.67

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.